Winding for electrical machines.



B. G. LAMME.

WINDING FOR ELECTRICAL MACHINES.

(Application filed June 28, 1901.)

Patented Jan. 28, I902.

. (No Model.)

WITNESSES Hi/Yuup UNITED STATES I ATENT Enron.

BENJAMIN G. LA MME, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO WEST- INGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION 'OF PENNSYLVANIA.

WINDING FOR ELECTRlCAL MACHINES.

SEEQIFIGATION forming part of Letters Patent No. 692,022, dated January 28, 1902. Application filed Tune 26, 19Q1. Serial No. 66,148, (No model.)

To aZZ whom it may concern: cated therein is such that in the construc- Be it known that I, BENJAMIN G. LAMME,a tion illustrated in Figs. 1 and 2 I place a citizen of the United States, residing at Pittsblock or bar 6 of insulating material between burg, in the county of Allegheny and State of the bars 3 and 4 in order that the latter may 5 Pennsylvania, have invented new and useful be securely retained, respectively, in the Improvementsin Windings for Electrical Maouter and inner sides of the slot. chines, of which the following is a specifica- Each end connector7consists of two lengths tion.

, of strap-copper of substantially the same form Myinvention relates to electrical machines, and dimensions, the ends of which are joined,

I0 and more particularly to low-resistance windrespectively, to long and short bars in approings for such machines, which have the form priate slots to provide the number of mag of bars or strips having their ends joined by netic poles desired. The advantages of arconnectors after being inserted into the coreranging the long and short bars as here indislots of the'machine. cated is set forth in the above-mentioned patl5 The object of my invention is to provide a ent and need not therefore be here repeated.

winding which is suitable for machines of any It has been the usual practice heretofore in size or capacity, which may be readily apconstructing machines of this general charplied to the core and also be readily removed, acter to fasten the end connectors to the bars if desired, and which facilitates the attachby means of solder and rivets, it being neceszo ment of the end connectors in cases where the sary when such a winding is applied to the core-slots are close together. rotating member of the machine to make the My present invention is an improvement attachmentsnch that there will be no danger upon Patent No. 589,839, granted September of'separation of the said parts. 14:, 1897, to the Westinghouse Electric & Man- In case the core to which'the winding is to 25 ufacturing Company upon an application be applied hasalargeuumber of slots located filed by me, and, as above indicated, it is iuclose together it is difficult if not impossible 7 tended to embody the advantageous features to rivet the end connectors to the bar-conset forth in said patent and also an improveductors. I therefore propose to separate the ment whereby the end connectors may he ends of the'bars in each slot sufficiently to 0 readily and securely attached to the ends of provide a space through which one of the bar-conductors that are located in close proxstrips constituting an end connector may pro- 8o imity to each other. j ect, the two strips constituting the connector In the accompanying drawings, Figure 1 is being separated at the ends for this purpose an end elevation of an armature-core proand oneof them being soldered to one side of 3 5 vided with a portion of its set of bar-conducthe bar and the other tothe other side and tors and end connectors. Fig. 2 is a detail the two strips being riveted together adjacent View, partially in side elevation and partially to the lower side of the bar to which the conin section, of a portion of an armature-core, nector is attached. It will be seen that with the long and the short bar-conductors and the this construction the ends of the two straps 40 end connectors attached thereto. Figs. 3 and constituting a connector will be held so closely 4 are Views similar to Fig. 2, but showing two together by the rivet that the solder will be modifications. sufficient to prevent detachment of the con- The armature-core 1 is shown as provided 'nect-ors and that if it is desired for any purwith partially-closed and relatively deep slots pose to remove a connector or a bar the re- 45 2, in each of which is located a short outer moval may be readily effected without-disbar 3 and a long inner bar 4, which are retnrbing the other portions of the winding. 5 spectivelyprovided withf'sheaths 5, of suitable In Fig. 3 I have shown a construction in insulating material. The depth of each slot which the two bars and their insulatingas compared with the width of the bars 10- sheaths entirely fill the slot, and in order to provide space between the ends of the bars I cut away a portion of the outer bar, as indicated at 8.

In Fig. 4 I have shown a construction in which the same result as that illustrated in Fig. 3 is secured by bending the end of one of the bars away from the other, so as to provide a space between the two for the passage of the end of one of the straps of which the connector is composed. Either or both of the bars may obviously be bent to effect this result.

While I have illustrated the invention as applied to a rotating member of drum form, it will be understood that it is equally well adapted for and is intended to cover that type of machine in which the slotted core having the distributed winding is stationary and surrounds the other main member of the machine. It is not deemed necessary to illustrate this form of core with the winding applied thereto, inasmuch as both forms of core are well known in the art.

I claim as my invention- 1. In an electrical machine, a slotted core having short outer bars and long inner bars and double strap end'connectors, the strap ends being separated and fastened to both sides of the bar ends and those which are fastened to the short bars being both located at one side of the long bars.

2. In an electrical machine, a slotted core having a short and a long bar in each slot, the ends of which are spaced apart, and double strap end connectors the ends of which embrace the ends of the bars but are located at one side of the bars to which they are not connected.

3. In an electrical machine, a slotted core having a short and a long bar in each slot, the ends of which are spaced apart, and double strap end connectors, the ends of which embrace the bar ends and are riveted together in proximity thereto, the straps for each short bar being both located at one side of the long bar that is in the same slot.

In testimony whereof I have hereunto subscribed my name this 25th day of June, 1901.

BENJ. G. LAMME.

Witnesses:

JAMES B. YOUNG, WESLEY G. CARR. 

